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Note 4 - PF Medical (Details Textual) - USD ($) | Oct. 11, 2016 | Jul. 24, 2015 | Dec. 31, 2016
--- | --- | --- | ---
Professional Fees |  | $ 29,000 |
Share Purchase Agreement, Company Ownership Percentage Prior to Share Issuance |  | 64.00% |
Share Purchase Agreement, Company Ownership Percentage Post Share Issuance |  | 60.50% |
Private Investor [Member] |  |  |
Letter of Intent Agreement, Purchase of Preferred Stock, Amount | $ 10,000,000 |  |
Letter of Intent Agreement, Purchase of Preferred Stock, Per Share | $ 8 |  |
Letter of Intent Agreement, Percentage of Voting Rights to be Owned Upon Closing | 48.60% |  |
PF Medical [Member] |  |  |
Letter of Intent Agreement, Due from Affiliate After Closing, Amount | $ 500,000 |  |
Letter of Intent Agreement, Due from Affiliate After Closing, Payback Period | 30 days |  |
Letter of Intent Agreement, Remaining Balance |  |  | $ 1,962,000
Letter of Intent Agreement, Affiliate Balance After Closing, Payback Period | 120 days |  |
Preferred Stock Issued Upon Initial Closing [Member] | Private Investor [Member] |  |  |
Letter of Intent Agreement, Purchase of Preferred Stock, Amount | $ 5,000,000 |  |
Preferred Stock Issued Upon Second Closing [Member] | Private Investor [Member] |  |  |
Letter of Intent Agreement, Purchase of Preferred Stock, Amount | $ 5,000,000 |  |
PF Medical SA [Member] | Restricted Series F Stock [Member] | Digirad Agreements [Member] |  |  |
Share Purchase Agreement, Number of Shares |  | 71,429 |
Share Purchase Agreement, Aggregate Purchase Price |  | $ 1,000,000 |
Share Purchase Agreement, Shares Issued Percentage of Outstanding Shares |  | 5.40% |
PFM Corportation [Member] | Private Investor [Member] | Warrants Issued with Letter of Intent Agreement [Member] |  |  |
Warrant Term | 4 years |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | 468,750 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 9 |  |
PFM Corportation [Member] | Perma-Fix Environmental Services, Inc. [Member] | Warrants Issued with Letter of Intent Agreement [Member] |  |  |
Warrant Term | 4 years |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | 183,606 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 14 |  |

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